Non-Tacky Adhesive Fastening System

a non-tacky, adhesive technology, applied in the field of consumer goods, can solve the problems of skin irritation, the fastener in these systems may have a tendency to attach to undesired surfaces, and the system also has significant effects, so as to improve versatility, fit, and refastening performance.

Inactive Publication Date: 2008-05-08
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016] By employing various types of non-tacky adhesive fastening techniques either alone or in combination with other, conventional fastening techniques in connection with the articles described herein, the arti

Problems solved by technology

While mechanical and adhesive fastening systems provide certain consumer benefits, each system also has significant drawbacks.
Fasteners in these systems may have a tendency to attach to undesired surfaces such as clothing, carpet, or the wearer.
Furthermore, hooks are generally rigid and, if used in products which are placed in close contact to a wearer's skin, may cause skin irritation.
Fasteners in these systems also may become damaged during the high-speed formation process required for the commercially viable manufacture of consumer goods, such as diapers.
For example, hooks tend to get damaged during manufacture, and other mechanical-type fasteners such as buttons, tab and slots, or the like can also become damaged, torn, or otherwise adversely affected by high speed handling.
Another problem associated with mechanical fasteners is that they may not be sufficiently durable for use in consumer goods.
However, hook and loop fastening systems may prove inadequate for the peel force demands of a pant-type diaper.
If peel forces are too low, a child may be able to remove the diaper when such removal is undesired.
Another potential drawback of conventional mechanical fasteners, particularly in pant-type diapers, is that such fasteners may need to be located in an area of the diaper without stretch properties.
This may create a design limitation if the mechanical fastener is to be located in an area exhibiting stretch properties such as the side panels of a pant-type diaper.
The compromise made is typically to limit the size of the hook and loop fastening area, which results in a lack of versatility of the product and can diminish the desired fastening strength of the side panels of the article.
Like mechanical fastening systems, adhesive fastening systems also have drawbacks.
One such drawback of an adhesive fastening system includes the use of a tradi

Method used

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Examples

Experimental program
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examples

[0216] Various materials were tested to determine the resulting T-Peel force when two opposing planar surfaces were uniformly coated with different adherent / adherend combinations. Samples of the combinations were tested according to the T-Peel Test Method, and the resulting peel forces (in N / cm) for the combinations are summarized in Table 1. The samples were aged at a temperature of 60° C. and under 0.8 N / cm2 pressure prior to testing. The samples were aged for durations of 6 hours, 3 days, and / or 1 week, as indicated in Table 1. The reported peel force is an average from at least 3 samples. Absence of an entry in Table 1 indicates that the particular adherent / adherend combination was not tested.

[0217] The materials in the following examples are referenced by the acronyms provided below.

[0218] D1102: Kraton® D1102 is available from Kraton Polymers, Houston, Tex. D1102 is a styrene / butadiene / styrene triblock elastomer (16% diblock and 28% styrene). D1102 is extruded to form about ...

examples 1-4

[0230] For Example 1, test samples including a D1102 NT adherent and a PET NT adherend, both uniformly applied to planar test surfaces, were prepared and analyzed. The D1102 adherend is supplied in pellet-form and was extruded into about a 76 μm (3 mil) thick film. The D1102 adherent is a styrene / butadiene / styrene triblock elastomer having 16% diblock, and 28% styrene. The weight average molecular weight of the D1102 adherent was determined to be 71 kDa (determined by gel permeation chromatography using polystyrene standards in tetrahydrofuran). The D1102 adherent has a supplier-reported melt flow rate of 6 g / 10 min (as measured by ISO method 1133 at the conditions of 200° C. / 5 kg).

[0231] Test samples for Example 2 were prepared in the same way as Example 1, except that the oPA54 NT adherend was used in place of PET.

[0232] Test samples for Example 3 were prepared in the same way as Example 1, except that the oPA40 NT adherend was used in place of PET.

[0233] For Example 4, test sa...

examples 5-6

[0238] For Examples 5 and 6, test samples including a 4211 NT adherent and a oPA40 NT adherend, both uniformly applied to planar test surfaces as films, were prepared and analyzed. Both examples were tested according to the T-Peel test (after being aged for 3 days and at a temperature of 60° C. under 0.8 N / cm2 pressure) to determine the peel force required after the first engagement (i.e., prior to any refastening) and after the first refastening of the adherent / adherend system. For Example 5, no simulated contamination procedure was used prior to the T-Peel test. For Example 6, the simulated contamination procedure was used to contaminate both the adherent and adherend surfaces after the first engagement, but before the first refastening.

[0239] Table 6 provides the comparative results for the simulated contamination procedure. The T-Peel forces represent an average from 4 samples. As is apparent from Example 6, human fingers can contaminate and drastically reduce the adhesive effe...

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Abstract

Non-tacky adhesive fastening systems are disclosed, which systems include non-tacky patterned adhesive systems and non-tacky three-dimensional adhesive systems. In a non-tacky adhesive fastening system, an engaging member including a non-tacky adherent is engageable with a receiving member including a non-tacky adherend. In a non-tacky patterned adhesive system, at least one of the engaging member and receiving member has the adherent/adherend disposed thereon in a patterned fashion. In a non-tacky three-dimensional adhesive system, at least one of the engaging member and receiving member includes a plurality of projections, thereby forming at least one three-dimensional adhesive surface. The non-tacky adhesive fastening systems exhibit advantageous peel characteristics and exhibit an increased resistance to contamination. The non-tacky adhesive fastening systems can be included in absorbent articles such as diapers and other consumer goods.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims the benefit of U.S. Provisional Application No. 60 / 856,100, filed Nov. 2, 2006, the substance of which is incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention generally relates to consumer goods, such as absorbent articles, and fastening systems used therewith and, more specifically, to non-tacky adhesive fastening systems having a non-tacky adherent or a non-tacky adherend in a patterned or three-dimensional configuration that may be peeled apart with a low force. BACKGROUND OF THE INVENTION [0003] Fastening systems are widely used in a variety of applications where closure of components is required. Certain fastening systems are refastenable in that they are capable of multiple openings and closures. Items such as diapers and containers storing foodstuff or other consumer goods are commonly equipped with a fastening system and, typically, a refastenable fastening system. Such fast...

Claims

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Application Information

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IPC IPC(8): B32B3/06B32B7/12
CPCA61F13/581Y10T428/24802Y10T428/24008B65D65/14
Inventor DALAL, URMISH POPATLALMCKIERNAN, ROBIN LYNN
Owner THE PROCTER & GAMBLE COMPANY
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